Timer for UV

[ishtak]

Hi boffins,

How would I set an on/off timer for a UV light .. ie 6 hours on 6 hours off

Justin

[Pny]

I would leave it on, unless you have problem with the heat it generates... Turning on/off of any electrical product tend to reduce their life span.

[lnevo]

ReefAngel.Relay.Set(Port7, now()%43200<21600);

[lnevo]

For the record and to help people understand. The above command sets the port to On/Off based on the conditional.

The now()%43200 part divides the current time in seconds by 12 hours. If the remainder is less than 6 hours than the port will be on. If it's greater than 6 hours it will be off.

[ishtak]

Thanks Lee .. Pny, I've been told that if you run pellets then it is better to not run UV constantly.

[Smotz]

Hers's mine

Code: Select all

//  Only turn on UV Sterilizer between 11pm and 4am
    if ( (hour() >= 4) && (hour() < 23) )  // from 4a - 11p
    ReefAngel.Relay.Off(UVlight);
    else ReefAngel.Relay.On(UVlight);